Question

Can someone answer the First question? And explain it too?

Answer 1

Answer:

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i don't know

Answer 2

The one with smallest no. if moles will have smallest no. of molecules

as no.of molecules=no.of moles×6.023×10^23

moles=wt given /molecular wt

also moles=volume given(in litre) /22.4L

1. $22.4 \times 10 {}^{3} ml = 22.4l \\ moles = vol \: given \div 22.4 = 22.4 \div 22.4 = 1$
2. moles=22/mol wt of Co2=22/44=0.5
3. moles=11.2/22.4=0.5
4. 0.1 mole of Co2

Since lowest no. of moles are in 4th hence it will also have lowest no. of molecules